Impact of aerially appliedBacillus thuringiensis and carbaryl on gypsy moth [Lep.: Lymantriidae] and adult parasites |
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| Authors: | R Reardon W Metterhouse R Balaam |
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| Institution: | (1) Gypsy Doth Program, Northeastern Area State and Private Forestry, U.S.D.A., 06514 Hamden, CT, USA;(2) Division of Plant Industry, New Jersey Department of Agriculture, 06825 Trenton, NJ, USA |
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| Abstract: | In 1973, Dipel® (Bacillus thuringiensis Berliner) and Sevin® 4 oil (carbaryl) were applied aerially on a dense population of gypsy moths,Lymantria dispar (L.), to evaluate the effect of these biological and chemical insecticides on gypsy moth larvae and adult parasites. Both insecticides provided excellent protection of foliage (29 % average defoliation) and gypsy moth population reduction (99 %). Significantly fewerBrachymeria intermedia (Nees), andApanteles melanoscelus (Ratzeburg),Parasetigena silvestris (Robineau-Desvoidy) andCompsilura concinnata (Meigen) adult parasites were captured in the blocks treated with Sevin 4 oil or Dipel than in the control block during the treatment year and in 1974, respectively. |
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